Humans have impacted the biodiversity of trees both negatively and positively. Urbanization has led to the decrease of biodiversity through deforestation. Pollution has also decreased biodiversity. Genetic engineering has led to an increase in biodiversity. Cutting down entire regions of trees for product use is another negative impact of human activity on trees. Humans cultivate trees for harvesting fruit, nuts, and other products as well, which increases the populations of those specific trees.
answer
How has human use of trees had both a positive and negative impact?
question
Trees help maintain air quality by removing particles from the air. Trees remove a significant amount of carbon dioxide from the air. They also remove ozone and particulates that accumulate in the air. In addition to removing these particles, trees release oxygen back into the air. By removing carbon dioxide and returning oxygen, trees help maintain the balance between these gases in the atmosphere, replenishing the oxygen removed by organisms and removing the carbon dioxide released by organisms.
answer
Explain how trees help maintain air quality.
question
C
answer
Which of the following statements about human impact on trees is true?
a.
Human activity always has a negative impact on trees.
b.
All human uses of trees require destruction of the trees.
c.
Human activity has had both a positive and negative impact on trees.
d.
Cutting down trees is the only activity that has a negative impact on trees.
Please select the best answer from the choices provided
question
C
answer
Approximately how many plant made pharmaceuticals are currently under different stages of discovery?
a.
100
b.
200
c.
300
d.
400
Please select the best answer from the choices provided
question
Trees can provide a habitat for insects and for other plants as well. In some cases, the insects and the plants can have a negative impact on the health of a tree. In other cases, the tree may be unaffected by the presence of the plant or tree. Insects can be beneficial to trees as well. Some species of trees rely on insects for pollination.
answer
Compare the relationship of trees with other plants and with insects.
question
B
answer
How do trees improve water quality?
a.
Tree roots anchor soil in place, preventing runoff.
b.
Water is filtered as it passes through the root systems of trees.
c.
An adult tree can store nearly 250 gallons of water.
d.
All of the above
Please select the best answer from the choices provided
question
B
answer
Arboreal animals are animals that _______.
a.
rely on trees for food
b.
live in trees
c.
are harmful to trees
d.
none of the above
Please select the best answer from the choices provided
question
Biopharmaceuticals are produced by using genetically engineered plants. These plants are engineered to produce particular proteins that are then used in specific types of medicines. This is different from pharmaceuticals that are derived directly from plants, such as medicine that is obtained from the bark of certain trees.
answer
Explain how biopharmaceuticals can be created using plants.
question
D
answer
What percent of the trees cut down are used for something other than paper?
a.
35%
b.
45%
c.
55%
d.
65%
Please select the best answer from the choices provided
question
D
answer
Every year one hundred trees remove approximately _______ from the atmosphere.
a.
five tons of carbon dioxide
b.
four hundred pounds of ozone
c.
three hundred pounds of particulates
d.
all of the above
Please select the best answer from the choices provided
question
D
answer
Which of the following is a way that trees have been negatively impacted by human use?
a.
deforestation
b.
pollution
c.
reduction
d.
all of the above
Please select the best answer from the choices provided
question
F
answer
In creating products from trees, only half of the tree can be used.
Please select the best answer from the choices provided
question
D
answer
Which of the following is a way humans use trees?
a.
paper
b.
food
c.
wood
d.
all of the above
Please select the best answer from the choices provided
question
F
answer
The fruit of trees is the only part that is used by humans for food.
Please select the best answer from the choices provided
question
B
answer
The most common fiber used to make paper is _______.
a.
cloth
b.
wood
c.
hemp
d.
flax
Please select the best answer from the choices provided
question
C
answer
Which of the following is not released by trees into the atmosphere?
a.
oxygen
b.
water vapor
c.
ozone
d.
none of the above
Please select the best answer from the choices provided
question
NOT C
answer
Why are environmentalists concerned about the introduction of genetically engineered trees?
a.
Genetically engineered trees are not regulated.
b.
Genetically engineered trees could have unexpected interactions with organisms of natural ecosystems.
c.
Genetically engineered trees decrease the biodiversity of natural ecosystems.
d.
All of the above
Please select the best answer from the choices provided
question
NOT B
answer
Which of the following statements about the interactions between insects and trees is not true?
a.
For some species of trees, insects are required for pollination.
b.
Trees provide necessary shelter for a variety of insect species.
c.
Insects have predatory relationships with trees, rather than mutually beneficial ones.
d.
Insects can cause loss of tree productivity and even death.
Please select the best answer from the choices provided
question
NOT D
answer
How does the relationship between flying dragons and trees compare to that of iguanas and trees?
a.
Flying dragons rely on trees for a food source, but not for shelter while iguanas rely on trees for both food and shelter.
b.
Flying dragons live exclusively in trees except to lay eggs, while iguanas will venture to the ground more frequently.
c.
Flying dragons use trees for shelter, but not for food, while iguanas rely on trees for food but not for shelter.
d.
Flying dragons and iguanas have an identical relationship with trees.
Please select the best answer from the choices provided
question
B
answer
Which of the following is not a way in which trees benefit the environment?
a.
They remove a significant amount of carbon dioxide from the atmosphere.
b.
They remove a significant amount of oxygen from the atmosphere.
c.
Their roots hold soil in place, reducing rates of erosion.
d.
They remove ozone and particulates from the atmosphere.
Please select the best answer from the choices provided
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